Patents by Inventor Hidetaka Kuroiwa

Hidetaka Kuroiwa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Automatic gain control for magnetic disk-drive preamplifier
    Patent number: 7835098
    Abstract: One embodiment of the invention includes a preamplifier system for a magnetic disk-drive. The system comprises a read amplifier configured to generate a read signal corresponding to data that is read from a magnetic disk via a magneto-resistive (MR) read head. The system also comprises a gain control amplifier that is configured to amplify the read signal based on a digital gain value to generate an amplified read signal. The system further comprises a feed-forward automatic gain controller (AGC) configured to set the digital gain value based on an amplitude of the read signal.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: November 16, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Hiroyuki Mukai, Hidetaka Kuroiwa
  • Methods and apparatus to monitor hard-disk drive head position
    Publication number: 20080204922
    Abstract: Methods and apparatus to monitor hard-disk drive head position are described.
    Type: Application
    Filed: February 28, 2007
    Publication date: August 28, 2008
    Inventors: Motomu Hashizume, Hiroyuki Mukai, Yukihisa Hirotsugu, Hidetaka Kuroiwa, Naoko Jinguji